Greenfield Township - 8900 Dougan Rd.   Kuhl Hose was dispatched to assist Greenfield fire with an Engine and Tanker for a structure fire.  Harborcreek 225 arrived on the scene and reported a working fire.  682 Engine arrived and established water supply using portable ponds and a tanker shuttle was set up.  Crews from HC and KH made entry into the 1st and 2nd floor for an interior attack.  Fire conditions forced crews from the building and an exterior attack was made.   Crews contained the fire in about an hour, but were on the scene doing overhaul for several hours.  3 injuries were reported, 2 electrical shock, and 1 Firefighter with a foot injury.  Of the 3 one of the shock patients was taken to Mercy Hospital Pittsburgh.  The Fire is under investigation.